Window moving problem

[Matthew D Allen <s2mdalle titan vcu edu>]

Here is the source code to a simple 3 function program which demonstrates
a problem I've been having consistantly with window moving functions.
When I compile and run this program, I click on the button, and the
application goes to the upper left hand corner, and with each subsequent
click on the button, it goes a bit to the right and a bit down.  The code
is supposed to make it go just 10 pixels to the right and that's it, but
instead I get sometimes jumpy behavior and never totally correct behavior.
If there are any suggestions on what I might be doing wrong, I would
appreciate hearing them, but as far as I can see I'm using the functoins
correctly.

At the heart of the problem are these calls:  I call
gdk_window_get_position(window->window, &someint, &someotherint);

someint += 10;

gdk_window_move(window->window, someint, someotherint);

which should move the window only to the right but doesn't.  

Sample code:  This when compiled should act strangely.

#------------#

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include <gtk/gtk.h>

void silly_callback(GtkWidget *e, gpointer data)
{
     GtkWidget *window = (GtkWidget *)data;
     int x=0, y=0;

     gdk_window_get_position(window->window, &x, &y);
     
     /* Just shift the window to the right by 10 pixels. */
     x += 10;

     gdk_window_move(window->window, x, y);
} /* End callback */

void die_now(GtkWidget *e, gpointer data)
{
     printf("Destroying...");    fflush(stdout);
     gtk_widget_destroy((GtkWidget *)data);
     printf("Exiting...");       fflush(stdout);
     gtk_main_quit();   
     printf("Quitting.\n");      fflush(stdout);
     exit(0);
} /* End die_now */

int main(int argc, char *argv[])
{
     GtkWidget *window, *button;

     gtk_init(&argc, &argv);

     window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
     button = gtk_button_new_with_label("Click me");

     gtk_window_set_policy(GTK_WINDOW(window), TRUE, TRUE, TRUE);

     gtk_container_add(GTK_CONTAINER(window), button);
     gtk_widget_realize(window);

     gtk_signal_connect(GTK_OBJECT(button), "clicked",
                        GTK_SIGNAL_FUNC(silly_callback), window);
     gtk_signal_connect(GTK_OBJECT(window), "delete_event",
                      GTK_SIGNAL_FUNC(die_now), window);
     gtk_signal_connect(GTK_OBJECT(window), "destroy",
                        GTK_SIGNAL_FUNC(die_now), window);

     gtk_widget_show_all(window);

     gtk_main();
     exit(0);
} /* End main */

#----#

That's it.  Any suggestions on what I'm screwing up here?


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